A kind of graphene modified cyanate ester resin and preparation method thereof

Abstract

The invention provides a graphene modified cyanate resin and a preparation method thereof, wherein the graphene modified cyanate resin comprises a cyanate resin, graphene and a coupling agent. According to the preparation method, the graphene is added into the cyanate resin in two parts, the second part of the graphene is added after the first part of the graphene is mixed with the cyanate resin and the coupling agent, and dispersion is performed by using a non-intrusive gravity dispersion process. According to the present invention, through the synergetic effect of the coupling agent and thenon-intrusive gravity dispersion process, the addition of a large amount of the graphene into the cyanate resin under the conditions of a small amount of the coupling agent and no solvent is achieved,such that the thermal conductivity, the electrical conductivity, the dielectric constant and the glass transition temperature of the modified cyanate resin are substantially improved.

Description

technical field [0001] The invention relates to a graphene-modified cyanate resin and a preparation method thereof, belonging to the technical field of resin modification. Background technique [0002] Graphene is a two-dimensional carbon atom crystal with sp2 hybrid orbitals. Its unique two-dimensional crystal structure endows graphene with excellent optical, electrical, mechanical and thermal properties, making graphene applicable in optoelectronic materials, transmission Sensors and detectors, energy storage materials and polymer composite materials and other fields. [0003] Blending graphene into the adhesive, using the unique nano-effect of graphene to change the characteristics of the adhesive, endowing the adhesive with high thermal conductivity, high electrical conductivity, high dielectric constant and high temperature resistance, making it suitable for supercapacitors, high-performance absorbers Wave composite materials and other fields have been applied. At pre...

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Problems solved by technology

However, for powder materials such as graphene, which has a larger specific surface area and greater surface interaction force, the non-interventional gravity disperser is not effective in dispersing, and there are problems of agglomeration and phase separation in the later stage of graphene, which affect the final quality of the material. performance

[0005] The chemical method is to modify the surface of graphene with a coupling agent such as silane, so that it has an affinity group with the adhesive, and improves its interfacial bonding with the adhesive. However, a large amount of solvent must be added during the modification process. The amount of coupling agent added is several times or even ten times that of graphene to achieve a more obvious improvement. On the one hand, the solvent removal process in the later stage is cumbersome; on the other hand, the addition of a large amount of coupling agent will also have a negative impact on the adhesive system.

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